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Optical properties of InAs nanowires

Grant number: 12/22617-7
Support type:Research Grants - Visiting Researcher Grant - International
Duration: March 01, 2013 - August 31, 2013
Field of knowledge:Physical Sciences and Mathematics - Physics - Condensed Matter Physics
Principal researcher:Fernando Iikawa
Grantee:Fernando Iikawa
Visiting researcher: Michael Möller
Visiting researcher institution: Universitat de València, Spain
Home Institution: Instituto de Física Gleb Wataghin (IFGW). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil


In this work, the optical and the lattice vibration properties of InAs-based nanowires will be investigated using photoluminescence and Raman scattering spectroscopy. The nanowire samples are grown by the vapor-liquid-solid method in a chemical beam epitaxy reactor under growth conditions where only the wurtzite phase is favored. We will study the electronic structure of wurtzite InAs in several sets of samples which contain pure InAsand core-shell InAs/InP structures. The growth of a thin InP shell around the InAs core reduces the surface effects that are crucial for optical emissions - mainly in narrow band gap semiconductors. Besides the band gap, higher energy transitions related to the valence band splitting, as well as the high energy conduction band at the center of the Brillouin zone in the wurtzite phase will be investigated. The effectof strain arising from the shell in these core-shell nanowires will be analyzed by using Raman scattering. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
MOLLER, M.; OLIVEIRA, D. S.; SAHOO, P. K.; COTTA, M. A.; IIKAWA, F.; MOTISUKE, P.; MOLINA-SANCHEZ, A.; DE LIMA, JR., M. M.; GARCIA-CRISTOBAL, A.; CANTARERO, A. Fermi energy dependence of the optical emission in core/shell InAs nanowire homostructures. Nanotechnology, v. 28, n. 29 JUL 21 2017. Web of Science Citations: 1.

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